Poria cocos (Fu Ling) is actually not very effective in treating hair loss because it primarily helps to expel dampness from the body, though it can provide some improvement and regulation. Therefore, if hair loss occurs, it is still necessary to promptly identify the underlying cause to better address the issue. Poria cocos is mainly used for its dampness-expelling properties, and the causes of hair loss can vary greatly, such as calcium deficiency, kidney deficiency, and bodily coldness, among others. If the hair loss is caused by bodily coldness, consuming Poria cocos can indeed have a beneficial effect. Additionally, eating foods like black sesame seeds or walnuts can also have a preventative effect against hair loss.